Toro Rosso team principal Franz Tost insists he is no rush to replace Daniel Ricciardo.

Ricciardo has finally been confirmed as Sebastian Vettel's team-mate at Red Bull for next year after Mark Webber's decision to quit Formula One at the end of the season and join Porsche's sportscar programme.

With Ricciardo's 'promotion', it paves the way for another product of the Red Bull Young Driver Programme to step up to Toro Rosso, with Antonio Felix da Costa the favourite.

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But Tost said: 'As to who will replace Daniel, we will now look at all our options and make a decision at a later date as there is no immediate need to rush.'

Tost is at least delighted to see Red Bull take a chance on 24-year-old Australian Ricciardo, just as they did with Vettel from 2010, as it justifies the viability of the development scheme.

'When Dietrich Mateschitz acquired the team that became Toro Rosso, his stated aim was that it should be the final step in the training of young drivers, with the eventual goal of graduating to the 'senior' team,' said Tost.

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'Daniel's move thus vindicates the work of the Red Bull Young Driver Programme and also proves that we at Toro Rosso have given him a good racing education.

'Daniel already knows his new team, having tested for them a few times, and I am sure he will soon feel at home there next year.

'They won't even have to change the Australian flag on the side of his car!'